Call CheckLinearizedFirstPage() when loading the first linearized page.

core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "parser_int.h"
 
 #include <set>
 #include <utility>
@@ skipping 4363 matching lines @@
     m_bAnnotsLoad = FALSE;
     m_bNeedDownLoadResource = FALSE;
     m_objs_array.RemoveAll();
     m_objnum_array.RemoveAll();
   }
   if (pdfium::ContainsKey(m_pagesLoadState, iPage))
     return DataAvailable;
 
   if (m_bLinearized) {
     if ((FX_DWORD)iPage == m_dwFirstPageNo) {
+      if (!CheckLinearizedFirstPage(iPage, pHints))
+        return DataNotAvailable;
       m_pagesLoadState.insert(iPage);
       return DataAvailable;
     }
     int32_t nResult = CheckLinearizedData(pHints);
     if (nResult != DataAvailable) {
       return nResult;
     }
     if (m_pHintTables) {
       nResult = m_pHintTables->CheckPage(iPage, pHints);
       if (nResult != DataAvailable)
@@ skipping 591 matching lines @@
   if (!m_pLinearizedDict)
     return -1;
   CPDF_Array* pRange = m_pLinearizedDict->GetArray("H");
   if (!pRange)
     return -1;
   CPDF_Object* pStreamLen = pRange->GetElementValue(1);
   if (!pStreamLen)
     return -1;
   return pStreamLen->GetInteger();
 }